[Free] Skype Credit (60 minutes / $1.17)

This is rather simple. For this you need a Facebook account and a Skype account!
So, here's what you do:

1. Go to THIS facebook page
2. Press Like
3. Look for the highlighted button:
   

And done! You should have received an email on the account attached to your facebook, with a promo code, follow the instructions and voila'!

Enjoy!